So I bought TangsFire 2pcs 18650 3600 mAh 3.7V x2. After having bought them I did some research on them and found that the ****fire tend to be avoided. How safe are the batteries themselves? I'm assuming the charger isn't that safe to use (assuming chinese made junk) however if the batteries are decent I will prolly just keep them as a backup to my 2 Panasonic NCR18650B 3400mAh. I plan on using the NiteCore IntelliCharger i2 to charge the TangsFire if they are decent.